In a ruling issued Sunday, Judge Reed O'Connor wrote that he stands by his earlier conclusion that the entire law is invalidated by congressional repeal of its fines on people who remain uninsured, like a house of cards collapsing.

However, because "many everyday Americans would ... face great uncertainty" if that ruling were immediately put into effect, O'Connor issued a stay to allow for appeals.

A group of Republican-led states brought the lawsuit. A coalition of Democratic state attorneys general, led by California's Xavier Becerra, intends to appeal. Congressional Democrats also plan to appeal.